Suggest Treatment For Melasma Of Face

My skin is very sensitive, which may be the result of continues uses of harsh creams and lotions for the treatment of my hyperpigmented (malasma) face. Recurrence of dark patches after ssuch trials and effort is so distressing which I cant spell in words. So for a last chance, can you give me some advice regarding malasma. I actually need a very effective and a lasting medication.